SYDNEY, the chief town of Cape Breton county, Nova Scotia, on a good harbour, the eastern terminus of the Intercolonial railway. Pop. (1891), 2427, (1901), 9900. Formerly a quiet country town, it became between 1891 and 1901 the chief shipping port of the Dominion Coa.l Company, and the site of the large works of the Dominion Iron and Steel Company. On the opposite side of the harbour are the flourishing towns of North Sydney and of Sydney Mines. It is the starting point for the line of steamers to the Bras d'Or lakes, and a favourite summer resort.